<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>第一个three.js文件_WebGL三维场景</title>
    <style>
        body {
            margin: 0;
            overflow: hidden; //隐藏body窗口区域滚动条
        }
    </style>
    <!--引入three.js三维引擎-->
    <!-- 引入三维引擎 -->
    <script src="../external/three-js-r93/build/three.js"></script>
    <!-- 扩展控件 OrbitControls -->
    <script src="../external/three-js-r93/examples/js/controls/OrbitControls.js"></script>
</head>

<body>

<script>
    /**
     * 创建场景对象
     */
    var scene = new THREE.Scene();
    /**
     * 创建一个设置重复纹理的管道
     */
    var curve = new THREE.CatmullRomCurve3([
        new THREE.Vector3(-80, -40, 0),
        new THREE.Vector3(-70, 40, 0),
        new THREE.Vector3(70, 40, 0),
        new THREE.Vector3(80, -40, 0)
    ]);
    var tubeGeometry = new THREE.TubeGeometry(curve, 100, 0.6, 50, false);
    var textureLoader = new THREE.TextureLoader();
    var texture = textureLoader.load('run.jpg');
    // 设置阵列模式为 RepeatWrapping
    texture.wrapS = THREE.RepeatWrapping
    texture.wrapT=THREE.RepeatWrapping
    // 设置x方向的偏移(沿着管道路径方向)，y方向默认1
    //等价texture.repeat= new THREE.Vector2(20,1)
    texture.repeat.x = 20;
    var tubeMaterial = new THREE.MeshPhongMaterial({
        map: texture,
        transparent: true,
    });
    var tube = new THREE.Mesh(tubeGeometry, tubeMaterial);
    scene.add(tube)
    /**
     * 创建一个半透明管道
     */
    var tubeGeometry2 = new THREE.TubeGeometry(curve, 100, 0, 50, false);
    var tubeMaterial2 = new THREE.MeshPhongMaterial({
        color: 0x4488ff,
        transparent: true,
        opacity: 0.3,
    });
    var tube2 = new THREE.Mesh(tubeGeometry2, tubeMaterial2);
    scene.add(tube2)
    /**
     * 创建两个立方体
     */
    function fun() {
        var box = new THREE.BoxGeometry(20, 50, 30); //创建一个立方体几何对象
        var material = new THREE.MeshPhongMaterial({
            color: 0x0000ff
        }); //材质对象
        var mesh = new THREE.Mesh(box, material); //网格模型对象
        scene.add(mesh); //网格模型添加到场景中
        mesh.position.set(-80, -50, 0)
        var mesh2 = mesh.clone()
        scene.add(mesh2); //网格模型添加到场景中
        mesh2.position.set(80, -50, 0)
    }
    fun()
    scene.add(new THREE.AxesHelper(300))
    /**
     * 光源设置
     */
        //点光源
    var point = new THREE.PointLight(0xffffff);
    point.position.set(400, 200, 300); //点光源位置
    scene.add(point); //点光源添加到场景中
    //环境光
    var ambient = new THREE.AmbientLight(0x888888);
    scene.add(ambient);
    /**
     * 相机设置
     */
    var width = window.innerWidth; //窗口宽度
    var height = window.innerHeight; //窗口高度
    var k = width / height; //窗口宽高比
    var s = 100; //三维场景缩放系数
    //创建相机对象
    var camera = new THREE.OrthographicCamera(-s * k, s * k, s, -s, 1, 1000);
    camera.position.set(200, 300, 200); //设置相机位置
    camera.lookAt(scene.position); //设置相机方向(指向的场景对象)
    /**
     * 创建渲染器对象
     */
    var renderer = new THREE.WebGLRenderer({
        antialias: true
    });
    renderer.setSize(width, height);
    // renderer.setClearColor(0xb9d3ff,1);//设置背景颜色
    document.body.appendChild(renderer.domElement); //body元素中插入canvas对象
    // 渲染函数
    function render() {
        renderer.render(scene, camera); //执行渲染操作
        requestAnimationFrame(render);
        // 使用加减法可以设置不同的运动方向
        // 设置纹理偏移
        texture.offset.x -= 0.01
    }
    render();
    var controls = new THREE.OrbitControls(camera); //创建控件对象
</script>
</body>

</html>
